97
Series 4000 Phone Coupler (Optional)
Test 2: Repeat Audio Gain
1. Advance to Test 2 by pressing the
Connect
button. Verify that Test 2 is running:
you should see two
1
/
3
-second blinks of the
Ring
LED every 3 seconds.
2. From the console, take the phone coupler off hook and transmit a steady 1 kHz
tone. Observe the 1 kHz tone on the Rx connector and on the Tx connector. This is
a verification test only.
3. The test will time out after 3 minutes, unless the
Connect
button is pressed again.
If the test is allowed to time out, the system will return to normal service. If the
Connect
button is pressed before the test times out, Test 3 will start.
Test 3: Hybrid Adjustment
1. This adjustment needs to be done on any system that will be supporting full duplex
operation. It will reduce the amount of audio reflected back to the console from the
hybrid.
2. Connect an oscilloscope to TP4.
3. Place a phone call to the coupler from another phone. While the phone line is
ringing, press the
Connect
button to advance to Test 3. Verify that Test 3 is
running: you should see three
1
/
3
-second blinks of the
Ring
LED every 3 seconds.
The coupler will now answer the ringing phone line and emit a dual-tone signal
comprised of a 400 Hz tone and a 2500 Hz tone. Adjust the two hybrid
potentiometers, R95 and R96, to obtain the lowest deviation on the coupler or the
lowest signal at pin 5 of P1. It is necessary to repeatedly adjust the potentiometers
to obtain the lowest signal level.
4. The test tone is available on the Rx input to the dual-channel card and can be heard
on the console speaker. It can be used to adjust the hybrid by adjusting to minimum
speaker output.
Coupler Signals
The following table identifies the punch-down block connections required for the Phone
Coupler.
Note
This test is performed at the factory and should never need to be
done again.
Note
This test needs to be performed during installation.
Note
On any single channel, the black connections are jumpered
together and the red connections are jumpered together.
Содержание 4000 Series
Страница 1: ...Series 4000 Communication Control System Installation and Configuration 025 9533Y...
Страница 6: ...6 025 9533Y...
Страница 28: ...Introduction 28 025 9533Y...
Страница 88: ...Common Control Equipment Installation 88 025 9533Y Figure 22 Console Duplex Wall Jacks...
Страница 110: ...Common Control Equipment Installation 110 025 9533Y...
Страница 172: ...Console Installation 172 025 9533Y...
Страница 192: ...Audio Level Adjustments 192 025 9533Y...
Страница 230: ...Accessory Installation 230 025 9533Y...
Страница 236: ...Console ANI Programming 236 025 9533Y...
Страница 339: ...339 RSMP Operation Figure 99 Main Screen...
Страница 350: ...Radio System Management Program 350 025 9533Y...
Страница 362: ...Appendix B Troubleshooting 362 025 9533Y...
Страница 417: ...417 Index wiring accessories 164 wall jack 86 wiring diagram for M4219 244 X XMT button labels 332 XP settings 247...
Страница 418: ...Index 418 025 9533Y...